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It is optimised for conduction cooling and has a baseplate temperature range of -40 to 95°C without the use of a fan. The power supply operates with a wide universal input range from 85 to 305V AC with power factor correction (PFC) with a coefficient of 0.98/0.95 (110VAC/230VAC).

The output voltage and current can be adjusted from near zero to the maximum allowed for each model.

The power supply is suitable for industrial applications which operate with limited or no ventilation cooling as well as electronic equipment installed in a sealed box, radio communication systems which are subject to adverse weather conditions, outdoor displays and traffic signalling and indoor equipment with very strict audible noise restrictions.

The OFI1200A operates with a wide universal input range from 85 to 305VAC (Nominal 100 to 277V AC). Three versions are available with a single output DC voltage, rated at 12V/84A, 28V/43A and 48V/25A. The typical efficiency for the 48V output unit at 230V AC input is 92%.

For industrial applications such as professional lighting or low power electrolysers which require the power supply to deliver constant current, users can adjust the voltage and current via two analogue inputs, VTRM and ITRM. The output voltage and current can be adjusted from near zero up to the maximum specified per model. For example, the 28V output can be adjusted from near 0V up to 33.6V. The output current from near 0A is up to 43A. The output voltage can also be adjusted using the onboard potentiometer.

The extended trimming and control function simplifies the use of the power supply in constant voltage (CV) or constant current (CC) mode, without adding external circuitry.

For applications requiring redundancy or higher power, it is possible to connect up to nine units in parallel, delivering a total power level of up to 9,720W in conduction cooling mode. When operated in parallel or in redundancy-mode, optional active ORing circuitry deploying high performance FET technology (Option-O) is available on the OFI1200A28 and OFI1200A48.

For safety, there is an in/out isolation of 3,000V AC and IN/FG of 2,000V AC. Output isolation to FG is 500V AC. The power supply includes over-current protection with auto recovery, over-voltage and over-temperature protection.

The OFI1200A board includes easy access to auxiliary functions via on board connectors, namely: remote control, output voltage sensing, power good, VTRM, ITRM.

The OFI1200A has passed shock and vibration testing as specified in MIL-STD-810H and is designed to sustain high, 20G level shocks.

In its open frame format, the OFI1200A measures 142 x 39 x 260mm (5.59 x 1.54 x 10.36 inches) and weighs 1.2kg max. An optional metal cover is available, adding just 1mm to the height and 200 grams to the weight, this is Option-N.

The OFI1200A is certified in accordance with UL62368-1 3rd edition, cUL (equivalent to CAN/CSA-C22.2 No.62368-1).

The OFI1200A series has a full three-year warranty and conforms to the European RoHS, REACH and Low Voltage Directives. The product carries the CE, UKCA and cURus markings.


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